public override int Read(IOfcNumberWriter writer, Block block, StreamBitReader reader)
{
// ReSharper disable once AssignmentInConditionalExpression
if (block.OverrideGlobalNb = reader.ReadByte(1) > 0)
{
block.NeededBits = reader.ReadByte(Metadata.MaxNeededBitsNeededBitsNumber);
}
// ReSharper disable once AssignmentInConditionalExpression
if (!Metadata.IsAbsolute)
{
if (block.AbsoluteSign = reader.ReadByte(1) > 0)
{
block.IsSignNegative = reader.ReadByte(1) > 0;
}
}
var hasAbsoluteSign = block.AbsoluteSign || Metadata.IsAbsolute;
var isNegative = block.AbsoluteSign && block.IsSignNegative || Metadata.IsAbsolute && Metadata.IsNegative;
for (var i = 0; i < block.Length; i++)
{
var num = new OfcNumber();
if (!hasAbsoluteSign)
{
isNegative = reader.ReadByte(1) > 0;
}
num.Number = ((long)reader.Read(Metadata.MaxNeededBitsNumber)) * (isNegative ? -1 : 1);
writer.Write(num);
}
return(block.Length);
}
public override int Read(IOfcNumberWriter writer, Block block, StreamBitReader reader)
{
var val1 = ReadSingleValueWithoutControlBit(reader, Metadata);
var val2 = ReadSingleValueWithoutControlBit(reader, Metadata);
writer.Write(val1);
writer.Write(val2);
var difference = val2.SubtractEach(val1);
for (var i = 1; i < block.Length - 1; i++)
{
writer.Write(difference.LinearMultiplyEach(i).AddEach(val2));
}
return(block.Length);
}
public override int Read(IOfcNumberWriter writer, Block block, StreamBitReader reader)
{
var value = ReadSingleValueWithoutControlBit(reader, Metadata);
for (var i = 0; i < block.Length; i++)
{
writer.Write(value);
}
return(block.Length);
}
public override int Read(IOfcNumberWriter writer, Block block, StreamBitReader reader)
{
var val1 = ReadSingleValueWithoutControlBit(reader, Metadata);
var val2 = ReadSingleValueWithoutControlBit(reader, Metadata);
var ppLength = reader.ReadByte(8);
var total = ppLength * block.Length;
for (var i = 0; i < total; i++)
{
writer.Write(i % (ppLength * 2) >= ppLength ? val2 : val1);
}
return(total);
}
public void Decompress()
{
var valueCount = 0;
while (valueCount < Metadata.ValueCount)
{
if (_bitReader.ReadByte(1) > 0) // isBlock
{
var block = DecompressionMethod.ReadDefaultBlockHeader(_bitReader, Metadata);
var method = GetMethodForBlock(block); // Get decompressor class for block type
valueCount += method.Read(_numberWriter, block, _bitReader);
}
else
{
_numberWriter.Write(DecompressionMethod.ReadSingleValueWithoutControlBit(_bitReader, Metadata));
valueCount++;
}
}
_writer?.Flush();
}